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(No Model.) 6 Sheets-Sheet 1.

J. M. TERME & J. DEI-IARBE. .MULTITUBULAR BOILER.

No. 372,580. Patented Nov. 1, 1887.

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J. M. TERME & J. DEHARBE. MULTITUBULAR BOILER.

(No Model.)

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N. PETERS. Pliolo-Lflhonphnr, Waihingtum D. c.

(No Model.) 6 Sheets--S heet 3. J. 1VL-TER1VIE & J. DEHARBE.

MULTITUBULAR BOILER.

No. 372,580. Patented Nov. 1, 1887.

(No Model.)

6 Sheets-Sheet 5. J. M. TERME & J. DEHARBE. MULTITUBULAR BOILER.

No. 372,580. Patented Nov. 1, 1887.

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UNITED STATES Tartar Orrice.

JOSEPH MARIE TERME AND JULES DEIIAEBE. OF PAR-IS, FRANCE, ASSIGI ORS TO THE SOCIETE ANONYME COOPERATIVE POUR LA CONSTRUCTION DE CHAUDIERES INEXPLOSIBLES, OE SAME PLACE.

MULTlTUBULAR BOILER.

SPECEPICATIOH f rming part of Letters Patent 1\TQ.372,580, dated November 1, 1887.

Application filed February 15, 1887. Serial No. 227.755.

4N0 model.)

Patented in France September 3, 1885, No, 170,091; in

England April 13, 1:86, No. 5,132, and in Germany April 91, 1886, No. 37,788.

To aZZ whom it may concern.-

Be it known that we, JOSEPH MARIE TERME and J ULES DEHARBE, citizens ofthe Republic of France,residing at Paris,in said Republic,have invented certain new and useful Improvements in )lultitubular Boilers, (for which we have obtained patents in France September 3, 1885, No. 170,991; in England, April 13, 1886, No. 5,182, and in Germany April 21, 1886, No. 37,788,) fully described and illustrated in the following specification and the accompanying drawings, forming-part of the same.

This invention has reference to multitnbular boilers in which the water to be evaporated is caused to travel through a series of inclined tubes while such tubes are acted upon externally by the flame and products of combustion from the furnace.

The improvements mainly consist, first, in constructing the boiler of a set or sets ofgroups of three tubes which are free to dilate, one of these tubes leading in an upwardly-inchned direction from a vertical water-head or manifold at the back of the boiler and conveying the water to a water-compartnient at the front, while the other two tubes lead also in an up wardly-inclined direction from the water-compartment to the header or manifold at the rear; secondly, in constructing the lowest watercompartments to receive two tubes and in combining them with the lower supply pipe or chamber; thirdly, in the general combination of the groups or tubes, thus arranged and forming a number of sets,'with a lower supply pipe or chamber with an upper or main steam drum, a steam-reservoir, a steam-drier, and a box or pipe for the collection and discharge of sediment.

\Ve will proceed to describe, with the aid of the annexed drawings, the construction of aboiler in which the improvements are embodied.

Figure 1 is a front view of the boiler with its furnace. The set of groups of tubes to the left hand is seen in end view and the next set in section. The other sets are concealed by Fig. 2 is a longitudinal section. Fig. 3 is an elevation of the rear end. Fig. 4 is a longitudinal elevation. Fig. 5 is a longitudinal section of a modificatiomwhich differs from that represented in the preceding figures in that there are return flame-tubes within the watertubcs. Figs. 6 to 12. are detail views, hereinafter described.

Referring first to Figs. 1 to 4, A is a chamber formingasteam and water reservoir, at the upper part of which is an inlet for steam from the upper or main steam-drum, K, and an outlet, from which steam passes through the pipe L to the drier M. From the lower part of the reservoir A a pipe, B, conveys water therefrom to a supply pipe or chamber, D, below the water-tubes. veyed to this chamber-tbat is to say. if the water be supplied to the reservoir. A and not directly to the pipe D. Below the pipe 13 is a box or pipe, C, titted with a discharge-cock for collecting and discharging sediment. At the front of the boiler are water-chambers E G G, superposed in vertical sets, and at the back of the boiler are vertical water headers or manifolds J J, equal in number. to the sets of water-chambers; or there may be one common header. The lowest water-chamber, E, of each set is in communication with the supply-chamber D, and is connected by two upwardly-inclined tubes, F F,with the header J at the back of the boiler. The other water-chambers,G G, (which are ofapproximately V form, so as to rest upon one another, as seen in Fig. 1,) each com muicate with the headers by three inclined tubes, of which two, I I,-risc from the water-chamber to the header, while the other, H, rises from the header to a higher waterchamber. These three tubes constitute a group or complete element. The feed-wator flows from the pipe or chamber D through the tubes F to the headers J, and the headers serve to feed the several groups or elements. The tube H of each group conveys water from the header to the water-chamber G, which distributes it to the tubes I I. The steam formed in the tubes l1 and 1 follows the same course as the water,

and readily discharges at the ends of the tubes I into the headers J. Above the headers J is the main drum K, which conducts the steam to the reservoir A, from which reservoir the pipe L conveys the steam to the drier M.

The feed-water is thus con- From this drier the steam-supply for the engine or other purpose is taken through the valve N. Each water-chamber and each vertical header has at its outer face as many openings as there are tubes communicating there with, and these openings are fitted with covers P,which can be removed by first releasing the nuts 0 of the anchor-bolts when it is required to clean the tubes. At the front of the boiler are corrugated or undulating sheet-iron doors Q, to inclose the watenchambers.

R B represent the furnace and its doors, and S S the ash-pit and its doors. When internal flame-tubes are used, (see T T, Fig. 5,) they are fitted within the tubes that rise from the waterchambers to the headers, and they extend at their front end through the water-chamber and at their back end through the headers. The

flames, after having acted upon the outside of the sets of tubes, return to the front of the boiler. enter the flame-tubes, and pass out at 'the back end thereof to the chimney. Each of the watertubes is formed at the ends with holes to receive the arms or flukes of an anchor-bolt, and this when in place is tightened up by a nut, so as to draw the external cone or taper of the tube end against a corresponding cone of the aperture in which the tube fits, and thereby makes a dry metallic joint. This is represented on a larger scale in Figs. 6, 7, and 8. In these figures A represents the watertube. a a are the holes therein. 0 is the anchor-bolt,whose arms or flukes enter the holes a a. B is the header, in which the end of the tube A is mounted. The orifice b is tapered, and the end of the tube A is likewise tapered. D is a cover to the opening in the outer face of the header B, and E is a nut for locking the anchor-bolt 0.

Instead of the tube ends being tapered, they may be formed with a ring or boss, b, Fig. 9, or 6, Fig. 11, or h, Fig. 12, to makejoint with the cone of the aperture in which the tube fits.

This ring or boss may be in a piece with the tube, or be a ring of copper or brass letinto it, as represented at d, Fig. 10.

The constructions shown in Figs. 6 to 12, and described above, form no part of our present invention.

What we claim, and desire to secure by Letters Patent, is-

1. In a multitubular boiler, a set or sets of tubes composed of groups of three, in combination with a Vertical Water-header at one end and with water-chambers at the other end, one tube of each group rising from the header to a water-chamber, and the other two tubes of the group rising from a water-chamber to the vertical header, substantially as set forth and shown.

2. In a multitubular boiler, a bottom water chamber, E, arranged to receive only two tubes, F F, in combination with a lower water-supply pipe or chamber, D, and with a set or sets of tubes composed of groups of three, having a vertical header at one end and water-chambers at the other end, one tube ofeach group ofthree rising from the vertical chamber to a waterchamber,a nd the other two tubes of the group rising from a water-chamber to the vertical header, substantially as set forth and shown. 3. In a multitubularboiler, the combination of the following parts or elements-viz: a set or sets of tubes composed of groups'of three,

H I I, water-headers J, water-chambers G, lower water-supply pipe or chamber, D, main steam-drum K, steam-reservoir A, steam-drier M, and sediment pipe or box 0, substantially as described and shown.-

In testimony whereof we have signed our names to this specification before two subscribing witnesses.

JOSEPH MARIE'IERME. JULES DEHARBE.

, \Vitnesses:

J EAN MONARD, ALBERT OAHEN. 

